Hi,
I am trying to characterize some benchmark programs using dtrace. The
first step is to determine the time that a program spends on the CPU (doing
computations), and the time it spends doing IO. The cpu time can be easily
determined using the on-cpu and off-cpu probes. I am having trouble figuring
out the io time. Using the io:start and io:done probes will not give me the
correct numbers, because the io event might take a long time to finish, before
which, the program would have gone back to the cpu..Any ideas?
Thanks.
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